| 摘要 |
PURPOSE:To perform stable emission of photoelectron for a long time, to perform stable and high-efficient charge to fine particles for a long time, and to facilitate maintenance and management by a method wherein an ultraviolet ray and/or radiation source is situated in a position located separately from treated gas and a photoelectron emitting material is irradiated by using a reflection surface. CONSTITUTION:After air containing microorganisms sucked with the aid of the fan of a fan part 8 is filtered by a prefilter 20, the air is irradiated with ultraviolet rays by means of a photoelectron emitting material 21, an ultraviolet ray lamp 22 mounted outside a gas flow passage, an ultraviolet rays reflection surface 23, a ultraviolet ray pass material 24, and an ultraviolet ray irradiating part 9 formed with electrodes 25. The irradiation with ultraviolet rays causes collection of fine particles in air charged by photoelectron emitted from the photoelectron emitting material by a charge fine particle collection filter 10 to provide clean air 26. In a gas treating container B formed by an ultraviolet ray pass material, an air cleaning space A is separated away from an ultraviolet ray lamp 20. Irradiation with ultraviolet rays by means of an ultraviolet ray lamp mounted in the gas treating container B is effected effectively through utilization of a reflection surface. |
